src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp

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rev 3688 : 7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by:


 205     _numWordsAllocated = 0;
 206   )
 207 
 208   _cmsSpace = new CompactibleFreeListSpace(_bts, MemRegion(bottom, end),
 209                                            use_adaptive_freelists,
 210                                            dictionaryChoice);
 211   NOT_PRODUCT(debug_cms_space = _cmsSpace;)
 212   if (_cmsSpace == NULL) {
 213     vm_exit_during_initialization(
 214       "CompactibleFreeListSpace allocation failure");
 215   }
 216   _cmsSpace->_gen = this;
 217 
 218   _gc_stats = new CMSGCStats();
 219 
 220   // Verify the assumption that FreeChunk::_prev and OopDesc::_klass
 221   // offsets match. The ability to tell free chunks from objects
 222   // depends on this property.
 223   debug_only(
 224     FreeChunk* junk = NULL;
 225     assert(UseCompressedOops ||
 226            junk->prev_addr() == (void*)(oop(junk)->klass_addr()),
 227            "Offset of FreeChunk::_prev within FreeChunk must match"
 228            "  that of OopDesc::_klass within OopDesc");
 229   )
 230   if (CollectedHeap::use_parallel_gc_threads()) {
 231     typedef CMSParGCThreadState* CMSParGCThreadStatePtr;
 232     _par_gc_thread_states =
 233       NEW_C_HEAP_ARRAY(CMSParGCThreadStatePtr, ParallelGCThreads, mtGC);
 234     if (_par_gc_thread_states == NULL) {
 235       vm_exit_during_initialization("Could not allocate par gc structs");
 236     }
 237     for (uint i = 0; i < ParallelGCThreads; i++) {
 238       _par_gc_thread_states[i] = new CMSParGCThreadState(cmsSpace());
 239       if (_par_gc_thread_states[i] == NULL) {
 240         vm_exit_during_initialization("Could not allocate par gc structs");
 241       }
 242     }
 243   } else {
 244     _par_gc_thread_states = NULL;
 245   }




 205     _numWordsAllocated = 0;
 206   )
 207 
 208   _cmsSpace = new CompactibleFreeListSpace(_bts, MemRegion(bottom, end),
 209                                            use_adaptive_freelists,
 210                                            dictionaryChoice);
 211   NOT_PRODUCT(debug_cms_space = _cmsSpace;)
 212   if (_cmsSpace == NULL) {
 213     vm_exit_during_initialization(
 214       "CompactibleFreeListSpace allocation failure");
 215   }
 216   _cmsSpace->_gen = this;
 217 
 218   _gc_stats = new CMSGCStats();
 219 
 220   // Verify the assumption that FreeChunk::_prev and OopDesc::_klass
 221   // offsets match. The ability to tell free chunks from objects
 222   // depends on this property.
 223   debug_only(
 224     FreeChunk* junk = NULL;
 225     assert(UseCompressedKlassPointers ||
 226            junk->prev_addr() == (void*)(oop(junk)->klass_addr()),
 227            "Offset of FreeChunk::_prev within FreeChunk must match"
 228            "  that of OopDesc::_klass within OopDesc");
 229   )
 230   if (CollectedHeap::use_parallel_gc_threads()) {
 231     typedef CMSParGCThreadState* CMSParGCThreadStatePtr;
 232     _par_gc_thread_states =
 233       NEW_C_HEAP_ARRAY(CMSParGCThreadStatePtr, ParallelGCThreads, mtGC);
 234     if (_par_gc_thread_states == NULL) {
 235       vm_exit_during_initialization("Could not allocate par gc structs");
 236     }
 237     for (uint i = 0; i < ParallelGCThreads; i++) {
 238       _par_gc_thread_states[i] = new CMSParGCThreadState(cmsSpace());
 239       if (_par_gc_thread_states[i] == NULL) {
 240         vm_exit_during_initialization("Could not allocate par gc structs");
 241       }
 242     }
 243   } else {
 244     _par_gc_thread_states = NULL;
 245   }